In algebra, to substitute means to replace a variable or term with a specific value.
The word algebraic indicates that a given expression or equation includes variables.
An expression that has numbers, operations and variables, but no equals sign.
Exponents are used to describe the number of times that a term is multiplied by itself.
Order of Operations
The order of operations specifies the order in which to perform each of multiple operations in an expression or equation. The order of operations is: P - parentheses, E - exponents, M/D - multiplication and division in order from left to right, A/S - addition and subtraction in order from left to right.
Parentheses "(" and ")" are used in algebraic expressions as grouping symbols.
Substitute values for variables and evaluate expressions.